System information design for neighboring cells in a non-terrestrial network

ABSTRACT

Various aspects of the present disclosure generally relate to wireless communication. In some aspects, a user equipment (UE) may receive system information associated with a set of neighboring cells included in a non-terrestrial network (NTN). The UE may be connected to or camped in a current cell included in the NTN. The current cell may be associated with a current platform. The UE may monitor a neighboring cell, of the set of neighboring cells, based at least in part on the system information. Numerous other aspects are provided.

CROSS-REFERENCE TO RELATED APPLICATION

This Patent Application claims priority to U.S. Provisional PatentApplication No. 62/976,073, filed on Feb. 13, 2020, entitled “SYSTEMINFORMATION DESIGN FOR NEIGHBORING CELLS IN A NON-TERRESTRIAL NETWORK,”and assigned to the assignee hereof. The disclosure of the priorApplication is considered part of and is incorporated by reference intothis Patent Application.

FIELD OF THE DISCLOSURE

Aspects of the present disclosure generally relate to wirelesscommunication and to techniques and apparatuses for communication ofsystem information for neighboring cells in a non-terrestrial network(NTN).

BACKGROUND

Wireless communication systems are widely deployed to provide varioustelecommunication services such as telephony, video, data, messaging,and broadcasts. Typical wireless communication systems may employmultiple-access technologies capable of supporting communication withmultiple users by sharing available system resources (e.g., bandwidth,transmit power, and/or the like). Examples of such multiple-accesstechnologies include code division multiple access (CDMA) systems, timedivision multiple access (TDMA) systems, frequency-division multipleaccess (FDMA) systems, orthogonal frequency-division multiple access(OFDMA) systems, single-carrier frequency-division multiple access(SC-FDMA) systems, time division synchronous code division multipleaccess (TD-SCDMA) systems, and Long Term Evolution (LTE).LTE/LTE-Advanced is a set of enhancements to the Universal MobileTelecommunications System (UMTS) mobile standard promulgated by theThird Generation Partnership Project (3GPP).

A wireless communication network may include a number of base stations(BSs) that can support communication for a number of user equipment(UEs). A UE may communicate with a BS via the downlink and uplink. Thedownlink (or forward link) refers to the communication link from the BSto the UE, and the uplink (or reverse link) refers to the communicationlink from the UE to the BS. As will be described in more detail herein,a BS may be referred to as a Node B, a gNB, an access point (AP), aradio head, a transmit receive point (TRP), a New Radio (NR) BS, a 5GNode B, and/or the like.

The above multiple access technologies have been adopted in varioustelecommunication standards to provide a common protocol that enablesdifferent user equipment to communicate on a municipal, national,regional, and even global level. NR, which may also be referred to as5G, is a set of enhancements to the LTE mobile standard promulgated bythe 3GPP. NR is designed to better support mobile broadband Internetaccess by improving spectral efficiency, lowering costs, improvingservices, making use of new spectrum, and better integrating with otheropen standards using orthogonal frequency division multiplexing (OFDM)with a cyclic prefix (CP) (CP-OFDM) on the downlink (DL), using CP-OFDMand/or SC-FDM (e.g., also known as discrete Fourier transform spreadOFDM (DFT-s-OFDM)) on the uplink (UL), as well as supportingbeamforming, multiple-input multiple-output (MIMO) antenna technology,and carrier aggregation. However, as the demand for mobile broadbandaccess continues to increase, there exists a need for furtherimprovements in LTE and NR technologies. Preferably, these improvementsshould be applicable to other multiple access technologies and thetelecommunication standards that employ these technologies.

SUMMARY

In some aspects, a method of wireless communication, performed by a UE,may include receiving system information associated with a set ofneighboring cells included in an NTN, wherein the UE is connected to orcamped in a current cell included in the NTN, the current cell beingassociated with a current platform; and monitoring a neighboring cell,of the set of neighboring cells, based at least in part on the systeminformation.

In some aspects, a method of wireless communication, performed by a basestation, may include determining system information associated with aset of neighboring cells included in an NTN, wherein a UE is connectedto or camped in a current cell included in the NTN, the current cellbeing associated with a current platform; and transmitting the systeminformation associated with the set of neighboring cells.

In some aspects, a UE for wireless communication may include a memoryand one or more processors operatively coupled to the memory. The memoryand the one or more processors may be configured to receive systeminformation associated with a set of neighboring cells included in anNTN, wherein the UE is connected to or camped in a current cell includedin the NTN, the current cell being associated with a current platform;and monitor a neighboring cell, of the set of neighboring cells, basedat least in part on the system information.

In some aspects, a base station for wireless communication may include amemory and one or more processors operatively coupled to the memory. Thememory and the one or more processors may be configured to determinesystem information associated with a set of neighboring cells includedin an NTN, wherein a UE is connected to or camped in a current cellincluded in the NTN, the current cell being associated with a currentplatform; and transmit the system information associated with the set ofneighboring cells.

In some aspects, a non-transitory computer-readable medium may store oneor more instructions for wireless communication. The one or moreinstructions, when executed by one or more processors of a UE, may causethe one or more processors to receive system information associated witha set of neighboring cells included in an NTN, wherein the UE isconnected to or camped in a current cell included in the NTN, thecurrent cell being associated with a current platform; and monitor aneighboring cell, of the set of neighboring cells, based at least inpart on the system information.

In some aspects, a non-transitory computer-readable medium may store oneor more instructions for wireless communication. The one or moreinstructions, when executed by one or more processors of a base station,may cause the one or more processors to determine system informationassociated with a set of neighboring cells included in an NTN, wherein aUE is connected to or camped in a current cell included in the NTN, thecurrent cell being associated with a current platform; and transmit thesystem information associated with the set of neighboring cells.

In some aspects, an apparatus for wireless communication may includemeans for receiving system information associated with a set ofneighboring cells included in an NTN, wherein the apparatus is connectedto or camped in a current cell included in the NTN, the current cellbeing associated with a current platform; and means for monitoring aneighboring cell, of the set of neighboring cells, based at least inpart on the system information.

In some aspects, an apparatus for wireless communication may includemeans for determining system information associated with a set ofneighboring cells included in an NTN, wherein a UE is connected to orcamped in a current cell included in the NTN, the current cell beingassociated with a current platform; and means for transmitting thesystem information associated with the set of neighboring cells.

Aspects generally include a method, apparatus, system, computer programproduct, non-transitory computer-readable medium, user equipment, basestation, wireless communication device, and/or processing system assubstantially described herein with reference to and as illustrated bythe drawings and specification.

The foregoing has outlined rather broadly the features and technicaladvantages of examples according to the disclosure in order that thedetailed description that follows may be better understood. Additionalfeatures and advantages will be described hereinafter. The conceptionand specific examples disclosed may be readily utilized as a basis formodifying or designing other structures for carrying out the samepurposes of the present disclosure. Such equivalent constructions do notdepart from the scope of the appended claims. Characteristics of theconcepts disclosed herein, both their organization and method ofoperation, together with associated advantages will be better understoodfrom the following description when considered in connection with theaccompanying figures. Each of the figures is provided for the purposesof illustration and description, and not as a definition of the limitsof the claims.

BRIEF DESCRIPTION OF THE DRAWINGS

So that the above-recited features of the present disclosure can beunderstood in detail, a more particular description, briefly summarizedabove, may be had by reference to aspects, some of which are illustratedin the appended drawings. It is to be noted, however, that the appendeddrawings illustrate only certain typical aspects of this disclosure andare therefore not to be considered limiting of its scope, for thedescription may admit to other equally effective aspects. The samereference numbers in different drawings may identify the same or similarelements.

FIG. 1 is a block diagram illustrating an example of a wirelesscommunication network, in accordance with various aspects of the presentdisclosure.

FIG. 2 is a block diagram illustrating an example of a base station incommunication with a UE in a wireless communication network, inaccordance with various aspects of the present disclosure.

FIGS. 3A and 3B are diagrams illustrating examples associated withcommunication of system information for neighboring cells in an NTN, inaccordance with various aspects of the present disclosure.

FIG. 4 is a diagram illustrating an example process performed, forexample, by a user equipment, in accordance with various aspects of thepresent disclosure.

FIG. 5 is a diagram illustrating an example process performed, forexample, by a base station, in accordance with various aspects of thepresent disclosure.

DETAILED DESCRIPTION

Various aspects of the disclosure are described more fully hereinafterwith reference to the accompanying drawings. This disclosure may,however, be embodied in many different forms and should not be construedas limited to any specific structure or function presented throughoutthis disclosure. Rather, these aspects are provided so that thisdisclosure will be thorough and complete, and will fully convey thescope of the disclosure to those skilled in the art. Based on theteachings herein one skilled in the art should appreciate that the scopeof the disclosure is intended to cover any aspect of the disclosuredisclosed herein, whether implemented independently of or combined withany other aspect of the disclosure. For example, an apparatus may beimplemented or a method may be practiced using any number of the aspectsset forth herein. In addition, the scope of the disclosure is intendedto cover such an apparatus or method which is practiced using otherstructure, functionality, or structure and functionality in addition toor other than the various aspects of the disclosure set forth herein. Itshould be understood that any aspect of the disclosure disclosed hereinmay be embodied by one or more elements of a claim.

Several aspects of telecommunication systems will now be presented withreference to various apparatuses and techniques. These apparatuses andtechniques will be described in the following detailed description andillustrated in the accompanying drawings by various blocks, modules,components, circuits, steps, processes, algorithms, and/or the like(collectively referred to as “elements”). These elements may beimplemented using hardware, software, or combinations thereof. Whethersuch elements are implemented as hardware or software depends upon theparticular application and design constraints imposed on the overallsystem.

It should be noted that while aspects may be described herein usingterminology commonly associated with 3G and/or 4G wireless technologies,aspects of the present disclosure can be applied in othergeneration-based communication systems, such as 5G and later, includingNR technologies.

FIG. 1 is a diagram illustrating a wireless network 100 in which aspectsof the present disclosure may be practiced. The wireless network 100 maybe an LTE network or some other wireless network, such as a 5G or NRnetwork. The wireless network 100 may include a number of BSs 110 (shownas BS 110 a, BS 110 b, BS 110 c, and BS 110 d) and other networkentities. ABS is an entity that communicates with user equipment (UEs)and may also be referred to as a base station, a NR BS, a Node B, a gNB,a 5G node B (NB), an access point, a transmit receive point (TRP),and/or the like. Each BS may provide communication coverage for aparticular geographic area. In 3GPP, the term “cell” can refer to acoverage area of a BS and/or a BS subsystem serving this coverage area,depending on the context in which the term is used.

A BS may provide communication coverage for a macro cell, a pico cell, afemto cell, and/or another type of cell. A macro cell may cover arelatively large geographic area (e.g., several kilometers in radius)and may allow unrestricted access by UEs with service subscription. Apico cell may cover a relatively small geographic area and may allowunrestricted access by UEs with service subscription. A femto cell maycover a relatively small geographic area (e.g., a home) and may allowrestricted access by UEs having association with the femto cell (e.g.,UEs in a closed subscriber group (CSG)). ABS for a macro cell may bereferred to as a macro BS. ABS for a pico cell may be referred to as apico BS. A BS for a femto cell may be referred to as a femto BS or ahome BS. In the example shown in FIG. 1, a BS 110 a may be a macro BSfor a macro cell 102 a, a BS 110 b may be a pico BS for a pico cell 102b, and a BS 110 c may be a femto BS for a femto cell 102 c. A BS maysupport one or multiple (e.g., three) cells. The terms “eNB”, “basestation”, “NR BS”, “gNB”, “TRP”, “AP”, “node B”, “5G NB”, and “cell” maybe used interchangeably herein.

In some aspects, a cell may not necessarily be stationary, and thegeographic area of the cell may move according to the location of amobile BS. In some aspects, the BSs may be interconnected to one anotherand/or to one or more other BSs or network nodes (not shown) in thewireless network 100 through various types of backhaul interfaces suchas a direct physical connection, a virtual network, and/or the likeusing any suitable transport network.

Wireless network 100 may also include relay stations. A relay station isan entity that can receive a transmission of data from an upstreamstation (e.g., a BS or a UE) and send a transmission of the data to adownstream station (e.g., a UE or a BS). A relay station may also be aUE that can relay transmissions for other UEs. In the example shown inFIG. 1, a relay station 110 d may communicate with macro BS 110 a and aUE 120 d in order to facilitate communication between BS 110 a and UE120 d. A relay station may also be referred to as a relay BS, a relaybase station, a relay, and/or the like.

Wireless network 100 may be a heterogeneous network that includes BSs ofdifferent types, e.g., macro BSs, pico BSs, femto BSs, relay BSs, and/orthe like. These different types of BSs may have different transmit powerlevels, different coverage areas, and different impacts on interferencein wireless network 100. For example, macro BSs may have a high transmitpower level (e.g., 5 to 40 watts) whereas pico BSs, femto BSs, and relayBSs may have lower transmit power levels (e.g., 0.1 to 2 watts).

In some examples, as indicated in FIG. 1, a cell may be provided by abase station 110 of a non-terrestrial network (NTN). Such a base station110 may also referred to as a non-terrestrial base station 110 or anon-terrestrial access point. As used herein, “NTN” may refer to anetwork for which access is provided by or assisted by a non-terrestrialbase station 110. In some NTN deployments, a non-terrestrial basestation 110 may be located on an airborne platform or a platform inorbit. Examples of such platforms include a satellite (e.g., a low earthorbit (LEO) satellite, a medium earth orbit (MEO) satellite, ageostationary orbit (GEO) satellite, or the like), a balloon, adirigible, an airplane, an unmanned aerial vehicle (UAV), a drone, orthe like.

In some NTN deployments (e.g., sometimes referred to as a transparentarchitecture or a bent pipe architecture), a non-terrestrial basestation 110 may act as a relay station to relay communications between aUE 120 and a terrestrial base station 110 (e.g., a base station 110located on the ground or on a tower). In this case, the non-terrestrialbase station 110 may perform, for example, frequency translation and/orradio frequency amplification for communications relayed between the UE120 and a terrestrial base station 110. For example, the UE 120 maytransmit an uplink communication to the non-terrestrial base station110, which may relay the uplink communication to a terrestrial basestation 110 (e.g., after performing frequency translation, radiofrequency amplification, and/or the like). The terrestrial base station110 may perform additional processing on the uplink communication and/ormay transmit the uplink communication to a core network. As anotherexample, the terrestrial base station 110 may transmit a downlinkcommunication to the non- terrestrial base station 110, which may relaythe downlink communication to the UE 120 (e.g., after performingfrequency translation, radio frequency amplification, and/or the like).In some aspects, a UE 120 and/or the terrestrial base station 110 may bereferred to as a ground station (GS).

A network controller 130 may couple to a set of BSs and may providecoordination and control for these BSs. Network controller 130 maycommunicate with the BSs via a backhaul. The BSs may also communicatewith one another, directly or indirectly, via a wireless or wirelinebackhaul.

UEs 120 (e.g., 120 a, 120 b, 120 c) may be dispersed throughout wirelessnetwork 100, and each UE may be stationary or mobile. A UE may also bereferred to as an access terminal, a terminal, a mobile station, asubscriber unit, a station, and/or the like. A UE may be a cellularphone (e.g., a smart phone), a personal digital assistant (PDA), awireless modem, a wireless communication device, a handheld device, alaptop computer, a cordless phone, a wireless local loop (WLL) station,a tablet, a camera, a gaming device, a netbook, a smartbook, anultrabook, a medical device or equipment, biometric sensors/devices,wearable devices (smart watches, smart clothing, smart glasses, smartwrist bands, smart jewelry (e.g., smart ring, smart bracelet)), anentertainment device (e.g., a music or video device, or a satelliteradio), a vehicular component or sensor, smart meters/sensors,industrial manufacturing equipment, a global positioning system device,or any other suitable device that is configured to communicate via awireless or wired medium.

Some UEs may be considered machine-type communication (MTC) or evolvedor enhanced machine-type communication (eMTC) UEs. MTC and eMTC UEsinclude, for example, robots, drones, remote devices, sensors, meters,monitors, location tags, and/or the like, that may communicate with abase station, another device (e.g., remote device), or some otherentity. A wireless node may provide, for example, connectivity for or toa network (e.g., a wide area network such as Internet or a cellularnetwork) via a wired or wireless communication link. Some UEs may beconsidered Internet-of-Things (IoT) devices, and/or may be implementedas NB-IoT (narrowband internet of things) devices. Some UEs may beconsidered a Customer Premises Equipment (CPE). UE 120 may be includedinside a housing that houses components of UE 120, such as processorcomponents, memory components, and/or the like. In some aspects, theprocessor components and the memory components may be coupled together.For example, the processor components (e.g., one or more processors) andthe memory components (e.g., a memory) may be operatively coupled,communicatively coupled, electronically coupled, electrically coupled,and/or the like.

In general, any number of wireless networks may be deployed in a givengeographic area. Each wireless network may support a particular radioaccess technology (RAT) and may operate on one or more frequencies. ARAT may also be referred to as a radio technology, an air interface,and/or the like. A frequency may also be referred to as a carrier, afrequency channel, and/or the like. Each frequency may support a singleRAT in a given geographic area in order to avoid interference betweenwireless networks of different RATs. In some cases, NR or 5G RATnetworks may be deployed.

In some aspects, two or more UEs 120 (e.g., shown as UE 120 a and UE 120e) may communicate directly using one or more sidelink channels (e.g.,without using a base station 110 as an intermediary to communicate withone another). For example, the UEs 120 may communicate usingpeer-to-peer (P2P) communications, device-to-device (D2D)communications, a vehicle-to-everything (V2X) protocol (e.g., which mayinclude a vehicle-to-vehicle (V2V) protocol, a vehicle-to-infrastructure(V2I) protocol, and/or the like), a mesh network, and/or the like. Inthis case, the UE 120 may perform scheduling operations, resourceselection operations, and/or other operations described elsewhere hereinas being performed by the base station 110.

As indicated above, FIG. 1 is provided as an example. Other examples maydiffer from what is described with regard to FIG. 1.

FIG. 2 shows a block diagram of a design 200 of base station 110 and UE120, which may be one of the base stations and one of the UEs in FIG. 1.Base station 110 may be equipped with T antennas 234 a through 234 t,and UE 120 may be equipped with R antennas 252 a through 252 r, where ingeneral T≥1 and R≥1.

At base station 110, a transmit processor 220 may receive data from adata source 212 for one or more UEs, select one or more modulation andcoding schemes (MCS) for each UE based at least in part on channelquality indicators (CQIs) received from the UE, process (e.g., encodeand modulate) the data for each UE based at least in part on the MCS(s)selected for the UE, and provide data symbols for all UEs. Transmitprocessor 220 may also process system information (e.g., for semi-staticresource partitioning information (SRPI) and/or the like) and controlinformation (e.g., CQI requests, grants, upper layer signaling, and/orthe like) and provide overhead symbols and control symbols. Transmitprocessor 220 may also generate reference symbols for reference signals(e.g., the cell-specific reference signal (CRS)) and synchronizationsignals (e.g., the primary synchronization signal (PSS) and secondarysynchronization signal (SSS)). A transmit (TX) multiple-inputmultiple-output (MIMO) processor 230 may perform spatial processing(e.g., precoding) on the data symbols, the control symbols, the overheadsymbols, and/or the reference symbols, if applicable, and may provide Toutput symbol streams to T modulators (MODs) 232 a through 232 t. Eachmodulator 232 may process a respective output symbol stream (e.g., forOFDM and/or the like) to obtain an output sample stream. Each modulator232 may further process (e.g., convert to analog, amplify, filter, andupconvert) the output sample stream to obtain a downlink signal. Tdownlink signals from modulators 232 a through 232 t may be transmittedvia T antennas 234 a through 234 t, respectively. According to variousaspects described in more detail below, the synchronization signals canbe generated with location encoding to convey additional information.

At UE 120, antennas 252 a through 252 r may receive the downlink signalsfrom base station 110 and/or other base stations and may providereceived signals to demodulators (DEMODs) 254 a through 254 r,respectively. Each demodulator 254 may condition (e.g., filter, amplify,downconvert, and digitize) a received signal to obtain input samples.Each demodulator 254 may further process the input samples (e.g., forOFDM and/or the like) to obtain received symbols. A MIMO detector 256may obtain received symbols from all R demodulators 254 a through 254 r,perform MIMO detection on the received symbols if applicable, andprovide detected symbols. A receive processor 258 may process (e.g.,demodulate and decode) the detected symbols, provide decoded data for UE120 to a data sink 260, and provide decoded control information andsystem information to a controller/processor 280. A channel processormay determine reference signal received power (RSRP), received signalstrength indicator (RSSI), reference signal received quality (RSRQ),channel quality indicator (CQI), and/or the like. In some aspects, oneor more components of UE 120 may be included in a housing.

On the uplink, at UE 120, a transmit processor 264 may receive andprocess data from a data source 262 and control information (e.g., forreports comprising RSRP, RSSI, RSRQ, CQI, and/or the like) fromcontroller/processor 280. Transmit processor 264 may also generatereference symbols for one or more reference signals. The symbols fromtransmit processor 264 may be precoded by a TX MIMO processor 266 ifapplicable, further processed by modulators 254 a through 254 r (e.g.,for DFT-s-OFDM, CP-OFDM, and/or the like), and transmitted to basestation 110. At base station 110, the uplink signals from UE 120 andother UEs may be received by antennas 234, processed by demodulators232, detected by a MIMO detector 236 if applicable, and furtherprocessed by a receive processor 238 to obtain decoded data and controlinformation sent by UE 120. Receive processor 238 may provide thedecoded data to a data sink 239 and the decoded control information tocontroller/processor 240. Base station 110 may include communicationunit 244 and communicate to network controller 130 via communicationunit 244. Network controller 130 may include communication unit 294,controller/processor 290, and memory 292.

Controller/processor 240 of base station 110, controller/processor 280of UE 120, and/or any other component(s) of FIG. 2 may perform one ormore techniques associated with communication of system information forneighboring cells in an NTN, as described in more detail elsewhereherein. For example, controller/processor 240 of base station 110,controller/processor 280 of UE 120, and/or any other component(s) ofFIG. 2 may perform or direct operations of, for example, process 4 ofFIG. 4, process 5 of FIG. 5, and/or other processes as described herein.Memories 242 and 282 may store data and program codes for base station110 and UE 120, respectively. In some aspects, memory 242 and/or memory282 may comprise a non-transitory computer-readable medium storing oneor more instructions for wireless communication. For example, the one ormore instructions, when executed (e.g., directly, or after compiling,converting, interpreting, and/or the like) by one or more processors ofthe base station 110 and/or the UE 120, may perform or direct operationsof, for example, process 4 of FIG. 4, process 5 of FIG. 5, and/or otherprocesses as described herein. In some aspects, executing instructionsmay include running the instructions, converting the instructions,compiling the instructions, interpreting the instructions, and/or thelike. A scheduler 246 may schedule UEs for data transmission on thedownlink and/or uplink.

In some aspects, UE 120 may include means for receiving systeminformation associated with a set of neighboring cells included in anNTN, wherein UE 120 is connected to or camped in a current cell includedin the NTN, the current cell being associated with a current platform;means for monitoring a neighboring cell, of the set of neighboringcells, based at least in part on the system information; and/or thelike. In some aspects, such means may include one or more components ofUE 120 described in connection with FIG. 2, such as controller/processor280, transmit processor 264, TX MIMO processor 266, MOD 254, antenna252, DEMOD 254, MIMO detector 256, receive processor 258, and/or thelike.

In some aspects, base station 110 may include means for determiningsystem information associated with a set of neighboring cells includedin an NTN, wherein a UE 120 is connected to or camped in a current cellincluded in the NTN, the current cell being associated with a currentplatform; means for transmitting the system information associated withthe set of neighboring cells; and/or the like. In some aspects, suchmeans may include one or more components of base station 110 describedin connection with FIG. 2, such as antenna 234, DEMOD 232, MIMO detector236, receive processor 238, controller/processor 240, transmit processor220, TX MIMO processor 230, MOD 232, antenna 234, and/or the like.

As indicated above, FIG. 2 is provided as an example. Other examples maydiffer from what is described with regard to FIG. 2.

As described above, an NTN may utilize non-terrestrial base stations(e.g., non-terrestrial base stations 110) located on platforms(sometimes referred to high altitude platforms (HAPs)) as nodes forproviding or assisting UEs (e.g., UEs 120) with access to a corenetwork. In an NTN, and similar to a terrestrial cellular network, theNTN system may be deployed in cells. A cell in which a UE is connectedto or camped in is referred to as a current cell of the UE. The UE candynamically switch to a neighboring cell of the current cell in variousscenarios. For example, when the current cell is provided by ageostationary platform, such as a GEO satellite, the UE may switch to aneighboring cell due to movement of the UE. As another example, when thecurrent cell is provided by a non-geostationary platform, such as a LEOsatellite, the UE may switch to a neighboring cell due to movement ofthe platform and/or movement of the UE.

In an NTN system, again similar to a terrestrial cellular network,system information should be broadcast in a cell. To facilitate UEmobility (e.g., cell re-selection or handover) within the NTN network,system information should be broadcast for the current cell andneighboring cells of the current cell. However, unlike the terrestrialcellular network, NTN platforms typically have pre-determined locations(e.g., in an orbit) and the UE is equipped with high-gain narrow-beamdirectional antennas (e.g., a dish). A design of a means for conveyingsystem information in an NTN (e.g., a system information block (SIB))should take these factors into account.

A design for an NR NTN can be based on an NR system design. A typicalSIB in an NR system provides information regarding neighboring frequencycarriers and neighboring cells. For example, SIB3 is designed to conveyintra-frequency neighboring cell information (e.g., a list ofintra-frequency neighboring cells with specific cell re-selectionparameters and a list of blacklisted intra-frequency neighboring cells),while SIB4 is designed to convey inter-frequency carrier and neighboringcell information (e.g., a list of neighboring carrier frequencies andfrequency specific cell re-selection information, a list ofinter-frequency neighboring cells with specific cell re-selectionparameters, and a list of blacklisted inter-frequency neighboringcells).

Some aspects described herein provide techniques and apparatuses forcommunication of system information for neighboring cells in an NTN.Various example techniques for conveying system information forneighboring cells in an NTN are described below.

FIGS. 3A and 3B are diagrams illustrating examples associated with commcommunication of system information for neighboring cells in an NTN, inaccordance with various aspects of the present disclosure.

In the example shown in FIG. 3A, a UE (e.g., a UE 120) is connected toor camped in a cell of an NTN, the cell of the NTN being provided by anon-terrestrial base station (e.g., a non-terrestrial base station 110).Here, the cell in which the UE is connected to or camped in is referredto as a current cell, and the platform that provides the current cell isreferred to as a current platform (shown as a satellite in FIG. 3A).

Notably, example FIG. 3A is an example in which the non-terrestrial basestation serves as a relay between the UE and a terrestrial base station(e.g., such that the UE 120 is provided access through a terrestrialbase station 110). However, in another example, the non-terrestrial basestation may provide access to the UE directly, rather than acting as arelay. In such a case, actions described below as being performed by theterrestrial base station would be performed by the non-terrestrial basestation.

As shown by reference 305 in FIG. 3A, the terrestrial base station maydetermine system information associated with a set of neighboring cellsincluded in an NTN. Here, the set of neighboring cells may be a set ofcells that neighbor the current cell. In some aspects, the set ofneighboring cells may include one or more intra-platform neighboringcells (e.g., one or more neighboring cells provided by the currentplatform) and/or one or more inter-platform neighboring cells (e.g., oneor more neighboring cells provided by another platform).

In some aspects, the information associated with the set of neighboringcells may include information indicating one or more characteristics orparameters of one or more intra-platform neighboring cells, one or moreneighboring platforms, one or more inter-platform neighboring cellsassociated with the one or more other platforms, cell specificinformation for the one or more neighboring cells, and/or another typeof information. Additional details regarding the system information areprovided below.

In some aspects, the terrestrial base station may determine the systeminformation associated with the set of neighboring cells based at leastin part on information stored or accessible by the terrestrial basestation. For example, the terrestrial base station may store informationassociated with a group of cells of the NTN, and may determine thesystem information associated with the set of neighboring cells based atleast in part on the stored information. As a particular example, theterrestrial base station may determine that the terrestrial base stationis to transmit system information associated with a set of neighboringcells of the current cell and, based at least in part on the storedinformation, may identify the set of neighboring cells of the currentcell and determine information associated with the set of neighboringcells.

As indicated by reference 310, the terrestrial base station may transmitthe system information associated with the set of neighboring cells. Insome aspects, the terrestrial base station may transmit (e.g.,broadcast) the system information associated with the set of neighboringcells of the current cell. In some aspects, the terrestrial base stationmay transmit the information associated with the set of neighboringcells on a periodic basis, in response to detecting a trigger, based atleast in part on a configuration of the terrestrial base station, and/orthe like. In some aspects, the terrestrial base station may transmit theinformation associated with the set of neighboring cells based at leastin part on receiving, from the UE, a request to provide informationassociated with a set of neighboring cells of the current cell.

As further indicated by reference 310, the UE may receive theinformation associated with the set of neighboring cells. In someaspects, the UE may attempt to receive the information associated withthe set of neighboring cells on a periodic basis, in response todetecting a trigger, based at least in part on a configuration of theUE, and/or the like, and may receive the information associated with theset of neighboring cells, accordingly. In some aspects, the UE mayattempt to receive the information associated with the set ofneighboring cells based at least in part on transmitting, to theterrestrial base station (via the current cell), a request to provideinformation associated with a set of neighboring cells of the currentcell, and may receive the information associated with the set ofneighboring cells, accordingly.

As shown by reference 315, the UE may monitor a neighboring cell (e.g.,measure the signal quality, track the position or track the frequency ofthe neighboring cell), of the set of neighboring cells, based at leastin part on the system information. For example, the UE may, based atleast in part on the information associated with the set of neighboringcells, select a target cell from the set of neighboring cells andinitiate a handover from the current cell to the target neighboringcell. Here, if the handover is successful, the UE may communicate (e.g.,transmit an uplink communication, receive a downlink communication) inthe target cell (now the current cell).

In a typical NR system, neighboring cells can be categorized intointra-frequency neighboring cells and inter-frequency neighboring cells.However, due to the architecture of an NTN system, it may becomparatively simpler to categorize neighboring cells intointra-platform (e.g., intra-satellite) neighboring cells andinter-platform (e.g., inter-satellite) neighboring cells. Thus, forcells provided by the same platform, platform specific information(e.g., positioning information, attitude information, and/or the like)may need to be commonly broadcast to all the cells. In comparison, cellspecific information (e.g., footprint information for one or more beamsof a given cell) may need to be transmitted to a given UE for each cell.

Therefore, in some aspects, the system information may include a list ofintra-platform neighboring cells associated with the platform (e.g.,information that identifies one or more neighboring cells provided bythe current platform). In some aspects, the system information mayfurther include a blacklist of intra-platform neighboring cellsassociated with the platform (e.g., information that identifies one ormore neighboring cells, provided by the current platform, that arereserved by the network and/or are not available or applicable formeasurements, handovers, cell reselections, and/or the like).

Further, in some aspects, the system information may include a list ofneighboring platforms (e.g., information that identifies one or moreother platforms associated with providing one or more of the set ofneighboring cells). Here, the system information may include a list ofneighboring cells associated with a given neighboring platform on thelist of neighboring platforms (e.g., information that identifies one ormore neighboring cells provided by the given neighboring platform). Insome aspects, the system information may further include a blacklist ofneighboring cells associated with a given neighboring platform on thelist of neighboring platforms (e.g., information that identifies one ormore neighboring cells, provided by the given neighboring platform, thatare reserved by the network and/or are not available or applicable formeasurements, handovers, cell reselections, and/or the like).

In a case in which the neighboring cells are categorized intointra-platform neighboring cells and inter-platform neighboring cells,the system information may, in some aspects, be conveyed using a SIBincluding system information for intra-platform neighboring cells and aSIB including system information for inter-platform neighboring cells.FIG. 3B is a diagram illustrating SIB structures for conveying thesystem information in such a manner. In FIG. 3B, the system information350 is conveyed using a SIB 355 and a SIB 360. As noted in FIG. 3B, SIB355 includes system information for intra-platform neighboring cells andSIB 360 includes system information for inter-platform neighboringcells. Notably, in the example shown in FIG. 3B, platform specificinformation for inter-platform neighboring cells (e.g., platformspecific information 365 a for platform A and platform specificinformation 365 b for platform B) is included in SIB 360, while platformspecific information for intra-platform neighboring cells needs not tobe transmitted in system information 350 (e.g., since such informationwould have already been conveyed in system information for the currentcell).

Notably, while conveying the system information associated with the setof neighboring cells based on categorization intra-platform neighboringcells and inter-platform neighboring cells in the manner described aboveis relatively simple, such an implementation may require a significantchange to an existing NR SIB structure. Thus, in some aspects, it may bedesirable to utilize an existing NR neighboring cell SIB structure(e.g., categorization into intra-frequency neighboring cells andinter-frequency neighboring cells) to convey the system information(e.g., so as to minimize the change to the NR SIB structure). Therefore,in some aspects (e.g., when the existing NR neighboring cell SIBstructure is used), the system information may include a platformidentifier in an information element for a given neighboring cell in theset of neighboring cells. That is, within the NR neighboring cell SIBstructure, the system information may include a platform identifier inan information element for each neighboring cell. Here, based at leastin part on the platform identifier, cells provided by a given platformcan be associated.

In some aspects, regardless of whether the system information isconveyed based at least in part on intra-platform/inter-platformcategorization or utilizes the existing NR neighboring cell SIBstructure, the system information may include one or more other types ofinformation.

For example, in some aspects, the system information may includeplatform specific information for a neighboring platform associated withone or more neighboring cells in the set of neighboring cells. Theplatform specific information may include, for example, orientationinformation associated with the neighboring platform (e.g., a satelliteattitude), positioning information associated with the neighboringplatform (e.g., information that can be used to derive a location and/ora speed of the platform at a given time, and/or an indication of anaccuracy of the information), and/or another type of informationassociated with the neighboring platform.

As another example, in some aspects, the system information may includecell specific information for each neighboring cell in the set ofneighboring cells. In some aspects, the cell specific information for agiven neighboring cell, of the set of neighboring cells, may include,for example, beam footprint information associated with a beam of thegiven neighboring cell (e.g., a beam orientation, a beam centerlocation, a beam size, a beam shape, and/or the like), information thatidentifies a transmit power associated with the platform associated withthe given neighboring cell, a cell identifier associated with the givenneighboring cell, and/or another type of information associated with theneighboring cell.

In some aspects, to conserve resources and reduce overhead, it isdesirable to broadcast platform specific system information, associatedwith a given platform, only once for all neighboring cells provided bythe given platform. Therefore, in a case in which the existing NRneighboring cell SIB structure is used for conveying the systeminformation in the manner described above, the system information mayinclude platform specific information, associated with a givenneighboring platform, in a single information element associated withone of the set of neighboring cells provided by the given platform. Insome aspects, a given information element for a given neighboring cellmay carry an indication of whether platform specific information for aplatform that provides the given neighboring cell is included in theinformation element. For example, a particular neighboring platform mayprovide a first neighboring cell and a second neighboring cell. Here, aninformation element associated with the first neighboring cell mayinclude platform specific information for the particular platform, andmay also include an indication that the information element associatedwith the first neighboring cell carries the platform specificinformation for the particular platform. Conversely, an informationelement associated with the second neighboring cell may not includeplatform specific information for the particular platform (since theinformation element associated with the first neighboring cell carriesthe platform specific information for the particular platform), and mayalso include an indication that the information element associated withthe second neighboring cell does not carry the platform specificinformation for the particular platform. Notably, such an indicator maynot be transmitted for intra-platform neighboring cells, in some aspects(e.g., since platform specific information for the current platformshould have be already provided).

In some aspects, the system information may include platform specificsystem information for one or more neighboring platforms, and cellspecific system information for one or more intra-platform neighboringcells and/or one or more inter-platform neighboring cells, as describedabove. In some aspects, such information may be conveyed as full (e.g.,stand-alone) information in the system information. Alternatively, insome aspects, the system information may include the full platformspecific information for one or more reference platforms, anddifferential information for one or more other platforms. Similarly, insome aspects, the system information may include full cell specificinformation for one or more reference cells, and differential cellspecific information for one or more other cells. For example, for agiven platform, a differential platform orientation may be defined asactual platform orientation for the given platform minus an actual beamorientation of a reference platform. Here, the system information mayinclude full platform specific information for the reference platform,and differential platform specific information for the given platform(and one or more other platforms). In some aspects, utilization ofdifferential information reduces an amount of information (e.g., anumber of bits) needed to transmit the system information.

Thus, in some aspects, the system information may include differentialinformation for one or more neighboring platforms associated with one ormore neighboring cells of the set of neighboring cells, where fullinformation associated with a reference platform is a reference for thedifferential information. In some aspects, the full informationassociated with the reference platform may be platform specificinformation associated with the current platform (i.e., the currentplatform may be used as the reference platform).

As an example, full positioning information for platform positioning canbe transmitted for the current platform, while differential positioninginformation can be provided for neighboring platforms. Here, the UE mayuse the full position information and differential positioninginformation for a given neighboring platform to reconstruct fullinformation for the given neighboring platform.

Similarly, in some aspects, the system information may includedifferential information for one or more neighboring cells of the set ofneighboring cells, where full information associated with a referencecell is a reference for the differential information. In some aspects,the full information associated with the reference cell may be cellspecific information associated with the reference cell. Here, thereference cell may be the current cell, a first cell of a particularplatform (e.g., the current platform or another platform), or a centercell of the particular platform (e.g., the current platform or anotherplatform).

As an example, full beam footprint information for a particular cell(e.g., current cell, first cell, or center cell) of a platform can betransmitted, while differential beam footprint information can betransmitted for other cells associated with the platform. Here, the UEmay use the full beam footprint information and differential beamfootprint information, associated with a given other cell, toreconstruct full beam footprint information for the given other cell.

As indicated above, FIGS. 3A and 3B are provided as examples. Otherexamples may differ from what is described with respect to FIGS. 3A and3B.

FIG. 4 is a diagram illustrating an example process 400 performed, forexample, by a UE, in accordance with various aspects of the presentdisclosure. Example process 400 is an example where the UE (e.g., UE 120and/or the like) performs operations associated with communication ofsystem information for neighboring cells in an NTN, in accordance withvarious aspects of the present disclosure.

As shown in FIG. 4, in some aspects, process 400 may include receivingsystem information associated with a set of neighboring cells includedin an NTN (block 410). For example, the UE (e.g., using receiveprocessor 258, controller/processor 280, memory 282, and/or the like)may receive system information associated with a set of neighboringcells included in an NTN, as described above. In some aspects, the UE isconnected to or camped in a current cell included in the NTN. In someaspects, the current cell is associated with a current platform.

As further shown in FIG. 4, in some aspects, process 400 may includemonitoring a neighboring cell, of the set of neighboring cells, based atleast in part on the system information (block 420). For example, the UE(e.g., using receive processor 258, transmit processor 264,controller/processor 280, memory 282, and/or the like) may monitor aneighboring cell, of the set of neighboring cells, based at least inpart on the system information, as described above.

Process 400 may include additional aspects, such as any single aspect orany combination of aspects described below and/or in connection with oneor more other processes described elsewhere herein.

In a first aspect, the system information includes a list ofintra-platform neighboring cells associated with the current platform.

In a second aspect, alone or in combination with the first aspect, thesystem information includes a blacklist of intra-platform neighboringcells associated with the current platform.

In a third aspect, alone or in combination with one or more of the firstand second aspects, the system information includes a list ofneighboring platforms.

In a fourth aspect, alone or in combination with one or more of thefirst through third aspects, the system information includes a list ofneighboring cells associated with a given neighboring platform on thelist of neighboring platforms.

In a fifth aspect, alone or in combination with one or more of the firstthrough fourth aspects, the system information includes a blacklist ofneighboring cells associated with a given neighboring platform on thelist of neighboring platforms.

In a sixth aspect, alone or in combination with one or more of the firstthrough fifth aspects, the system information includes a systeminformation block including system information for intra-platformneighboring cells and a system information block including systeminformation for inter-platform neighboring cells.

In a seventh aspect, alone or in combination with one or more of thefirst through sixth aspects, the system information includes platformspecific information for a neighboring platform, the neighboringplatform being associated with one or more neighboring cells in the setof neighboring cells.

In an eighth aspect, alone or in combination with one or more of thefirst through seventh aspects, the platform specific informationincludes orientation information associated with the neighboringplatform.

In a ninth aspect, alone or in combination with one or more of the firstthrough eighth aspects, the platform specific information includespositioning information associated with the neighboring platform.

In a tenth aspect, alone or in combination with one or more of the firstthrough ninth aspects, the system information includes cell specificinformation for each neighboring cell in the set of neighboring cells.

In an eleventh aspect, alone or in combination with one or more of thefirst through tenth aspects, the cell specific information for a givenneighboring cell of the set of neighboring cells includes beam footprintinformation associated with a beam of the given neighboring cell.

In a twelfth aspect, alone or in combination with one or more of thefirst through eleventh aspects, the cell specific information for agiven neighboring cell of the set of neighboring cells includesinformation that identifies a transmit power associated with the givenneighboring cell.

In a thirteenth aspect, alone or in combination with one or more of thefirst through twelfth aspects, the cell specific information for a givenneighboring cell of the set of neighboring cells includes a cellidentifier associated with the given neighboring cell.

In a fourteenth aspect, alone or in combination with one or more of thefirst through thirteenth aspects, the system information includes aplatform identifier in an information element for a given neighboringcell in the set of neighboring cells.

In a fifteenth aspect, alone or in combination with one or more of thefirst through fourteenth aspects, when the given neighboring cell isassociated with a neighboring platform, the information element includesan indication of whether platform specific information, associated withthe neighboring platform, is included in the information elementassociated with the given neighboring cell.

In a sixteenth aspect, alone or in combination with one or more of thefirst through fifteenth aspects, the information element includes theplatform specific information, associated with the given neighboringcell, when the indication indicates that the platform specificinformation is included in the information element.

In a seventeenth aspect, alone or in combination with one or more of thefirst through sixteenth aspects, the platform specific informationassociated with the neighboring platform is included in only oneinformation element of the system information for a single neighboringcell of the set of neighboring cells.

In an eighteenth aspect, alone or in combination with one or more of thefirst through seventeenth aspects, the system information does notinclude platform specific information associated with the currentplatform.

In a nineteenth aspect, alone or in combination with one or more of thefirst through eighteenth aspects, the system information includesdifferential information for one or more neighboring platformsassociated with one or more neighboring cells of the set of neighboringcells, wherein full information associated with a reference platform isa reference for the differential information.

In a twentieth aspect, alone or in combination with one or more of thefirst through nineteenth aspects, the full information associated withthe reference platform includes platform specific information associatedwith the current platform.

In a twenty-first aspect, alone or in combination with one or more ofthe first through twentieth aspects, the system information includesdifferential information for one or more neighboring cells of the set ofneighboring cells, wherein full information associated with a referencecell is a reference for the differential information.

In a twenty-second aspect, alone or in combination with one or more ofthe first through twenty-first aspects, the full information associatedwith the reference cell includes cell specific information associatedwith the reference cell, the reference cell being the current cell ofthe current platform, a first cell of a particular platform, or a centercell of the particular platform.

Although FIG. 4 shows example blocks of process 400, in some aspects,process 400 may include additional blocks, fewer blocks, differentblocks, or differently arranged blocks than those depicted in FIG. 4.Additionally, or alternatively, two or more of the blocks of process 400may be performed in parallel.

FIG. 5 is a diagram illustrating an example process 500 performed, forexample, by a base station, in accordance with various aspects of thepresent disclosure. Example process 500 is an example where the basestation (e.g., base station 110 and/or the like) performs operationsassociated with communication of system information for neighboringcells in an NTN, in accordance with various aspects of the presentdisclosure.

As shown in FIG. 5, in some aspects, process 500 may include determiningsystem information associated with a set of neighboring cells includedin an NTN (block 510). For example, the base station (e.g., usingtransmit processor 220, receive processor 238, controller/processor 240,memory 242, and/or the like) may determine system information associatedwith a set of neighboring cells included in an NTN, as described above.In some aspects, a UE (e.g., UE 120) is connected to or camped in acurrent cell included in the NTN. In some aspects, the current cell isassociated with a current platform.

As further shown in FIG. 5, in some aspects, process 500 may includetransmitting the system information associated with the set ofneighboring cells (block 520). For example, the base station (e.g.,using transmit processor 220, controller/processor 240, memory 242,and/or the like) may transmit the system information associated with theset of neighboring cells, as described above.

Process 500 may include additional aspects, such as any single aspect orany combination of aspects described below and/or in connection with oneor more other processes described elsewhere herein.

In a first aspect, the system information includes a list ofintra-platform neighboring cells associated with the current platform.

In a second aspect, alone or in combination with the first aspect, thesystem information includes a blacklist of intra-platform neighboringcells associated with the current platform.

In a third aspect, alone or in combination with one or more of the firstand second aspects, the system information includes a list ofneighboring platforms.

In a fourth aspect, alone or in combination with one or more of thefirst through third aspects, the system information includes a list ofneighboring cells associated with a given neighboring platform on thelist of neighboring platforms.

In a fifth aspect, alone or in combination with one or more of the firstthrough fourth aspects, the system information includes a blacklist ofneighboring cells associated with a given neighboring platform on thelist of neighboring platforms.

In a sixth aspect, alone or in combination with one or more of the firstthrough fifth aspects, the system information includes a systeminformation block including system information for intra-platformneighboring cells and a system information block including systeminformation for inter-platform neighboring cells.

In a seventh aspect, alone or in combination with one or more of thefirst through sixth aspects, the system information includes platformspecific information for a neighboring platform, the neighboringplatform being associated with one or more neighboring cells in the setof neighboring cells.

In an eighth aspect, alone or in combination with one or more of thefirst through seventh aspects, the platform specific informationincludes orientation information associated with the neighboringplatform.

In a ninth aspect, alone or in combination with one or more of the firstthrough eighth aspects, the platform specific information includespositioning information associated with the neighboring platform.

In a tenth aspect, alone or in combination with one or more of the firstthrough ninth aspects, the system information includes cell specificinformation for each neighboring cell in the set of neighboring cells.

In an eleventh aspect, alone or in combination with one or more of thefirst through tenth aspects, the cell specific information for a givenneighboring cell of the set of neighboring cells includes beam footprintinformation associated with a beam of the given neighboring cell.

In a twelfth aspect, alone or in combination with one or more of thefirst through eleventh aspects, the cell specific information for agiven neighboring cell of the set of neighboring cells includesinformation that identifies a transmit power associated with the givenneighboring cell.

In a thirteenth aspect, alone or in combination with one or more of thefirst through twelfth aspects, the cell specific information for a givenneighboring cell of the set of neighboring cells includes a cellidentifier associated with the given neighboring cell.

In a fourteenth aspect, alone or in combination with one or more of thefirst through thirteenth aspects, the system information includes aplatform identifier in an information element for a given neighboringcell in the set of neighboring cells.

In a fifteenth aspect, alone or in combination with one or more of thefirst through fourteenth aspects, when the given neighboring cell isassociated with a neighboring platform, the information element includesan indication of whether platform specific information, associated withthe neighboring platform, is included in the information elementassociated with the given neighboring cell.

In a sixteenth aspect, alone or in combination with one or more of thefirst through fifteenth aspects, the information element includes theplatform specific information, associated with the given neighboringcell, when the indication indicates that the platform specificinformation is included in the information element.

In a seventeenth aspect, alone or in combination with one or more of thefirst through sixteenth aspects, the platform specific informationassociated with the neighboring platform is included in only oneinformation element of the system information for a single neighboringcell of the set of neighboring cells.

In an eighteenth aspect, alone or in combination with one or more of thefirst through seventeenth aspects, the system information does notinclude platform specific information associated with the currentplatform.

In a nineteenth aspect, alone or in combination with one or more of thefirst through eighteenth aspects, the system information includesdifferential information for one or more neighboring platformsassociated with one or more neighboring cells of the set of neighboringcells, wherein full information associated with a reference platform isa reference for the differential information.

In a twentieth aspect, alone or in combination with one or more of thefirst through nineteenth aspects, the full information associated withthe reference platform includes platform specific information associatedwith the current platform.

In a twenty-first aspect, alone or in combination with one or more ofthe first through twentieth aspects, the system information includesdifferential information for one or more neighboring cells of the set ofneighboring cells, wherein full information associated with a referencecell is a reference for the differential information.

In a twenty-second aspect, alone or in combination with one or more ofthe first through twenty-first aspects, the full information associatedwith the reference cell includes cell specific information associatedwith the reference cell, the reference cell being the current cell ofthe current platform, a first cell of a particular platform, or a centercell of the particular platform.

Although FIG. 5 shows example blocks of process 500, in some aspects,process 500 may include additional blocks, fewer blocks, differentblocks, or differently arranged blocks than those depicted in FIG. 5.Additionally, or alternatively, two or more of the blocks of process 500may be performed in parallel.

The following provides an overview of some aspects of the presentdisclosure:

Aspect 1: A method of wireless communication performed by a userequipment (UE), comprising: receiving system information associated witha set of neighboring cells included in a non-terrestrial network (NTN),wherein the UE is connected to or camped in a current cell included inthe NTN, the current cell being associated with a current platform; andmonitoring a neighboring cell, of the set of neighboring cells, based atleast in part on the system information.

Aspect 2: The method of aspect 1, wherein the system informationincludes a list of intra-platform neighboring cells associated with thecurrent platform.

Aspect 3: The method of any of aspects 1-2, wherein the systeminformation includes a blacklist of intra-platform neighboring cellsassociated with the current platform.

Aspect 4: The method of any of aspects 1-3, wherein the systeminformation includes a list of neighboring platforms.

Aspect 5: The method of aspect 4, wherein the system informationincludes a list of neighboring cells associated with a given neighboringplatform on the list of neighboring platforms.

Aspect 6: The method of any of aspects 4-5, wherein the systeminformation includes a blacklist of neighboring cells associated with agiven neighboring platform on the list of neighboring platforms.

Aspect 7: The method of any of aspects 1-6, wherein the systeminformation includes a system information block including systeminformation for intra-platform neighboring cells and a systeminformation block including system information for inter-platformneighboring cells.

Aspect 8: The method of any of aspects 1-7, wherein the systeminformation includes platform specific information for a neighboringplatform, the neighboring platform being associated with one or moreneighboring cells in the set of neighboring cells.

Aspect 9: The method of any of aspects 1-8, wherein the platformspecific information includes orientation information associated withthe neighboring platform.

Aspect 10: The method of aspect 8, wherein the platform specificinformation includes positioning information associated with theneighboring platform.

Aspect 11: The method of any of aspects 1-10, wherein the systeminformation includes cell specific information for each neighboring cellin the set of neighboring cells.

Aspect 12: The method of aspect 11, wherein the cell specificinformation for a given neighboring cell of the set of neighboring cellsincludes beam footprint information associated with a beam of the givenneighboring cell.

Aspect 13: The method of any of aspects 11-12, wherein the cell specificinformation for a given neighboring cell of the set of neighboring cellsincludes information that identifies a transmit power associated withthe given neighboring cell.

Aspect 14: The method of any of aspects 11-13, wherein the cell specificinformation for a given neighboring cell of the set of neighboring cellsincludes a cell identifier associated with the given neighboring cell.

Aspect 15: The method of any of aspects 1-14, wherein the systeminformation includes a platform identifier in an information element fora given neighboring cell in the set of neighboring cells.

Aspect 16: The method of aspect 15, wherein, when the given neighboringcell is associated with a neighboring platform, the information elementincludes an indication of whether platform specific information,associated with the neighboring platform, is included in the informationelement associated with the given neighboring cell.

Aspect 17: The method of aspect 16, wherein the information elementincludes the platform specific information, associated with the givenneighboring cell, when the indication indicates that the platformspecific information is included in the information element.

Aspect 18: The method of any of aspects 16-17, wherein the platformspecific information associated with the neighboring platform isincluded in only one information element of the system information for asingle neighboring cell.

Aspect 19: The method of any of aspects 1-18, wherein the systeminformation does not include platform specific information associatedwith the current platform.

Aspect 20: The method of any of aspects 1-19, wherein the systeminformation includes differential information for one or moreneighboring platforms associated with one or more neighboring cells ofthe set of neighboring cells, wherein full information, associated witha reference platform, is a reference for the differential information.

Aspect 21: The method of aspect 20, wherein the full informationassociated with the reference platform includes platform specificinformation associated with the current platform.

Aspect 22: The method of any of aspects 1-21, wherein the systeminformation includes differential information for one or moreneighboring cells of the set of neighboring cells, wherein fullinformation, associated with a reference cell, is a reference for thedifferential information.

Aspect 23: The method of aspect 22, wherein the full informationassociated with the reference cell includes cell specific informationassociated with the reference cell, the reference cell being: thecurrent cell of the current platform, a first cell of a particularplatform, or a center cell of the particular platform.

Aspect 24: A method of wireless communication performed by a basestation, comprising: determining system information associated with aset of neighboring cells included in a non-terrestrial network (NTN),wherein a user equipment (UE) is connected to or camped in a currentcell included in the NTN, the current cell being associated with acurrent platform; and transmitting the system information associatedwith the set of neighboring cells.

Aspect 25: The method of aspect 24, wherein the system informationincludes a list of intra-platform neighboring cells associated with thecurrent platform.

Aspect 26: The method of any of aspects 24-25, wherein the systeminformation includes a blacklist of intra-platform neighboring cellsassociated with the current platform.

Aspect 27: The method of any of aspects 24-26, wherein the systeminformation includes a list of neighboring platforms.

Aspect 28: The method of aspect 27, wherein the system informationincludes a list of neighboring cells associated with a given neighboringplatform on the list of neighboring platforms.

Aspect 29: The method of any of aspects 27-28, wherein the systeminformation includes a blacklist of neighboring cells associated with agiven neighboring platform on the list of neighboring platforms.

Aspect 30: The method of any of aspects 24-29, wherein the systeminformation includes a system information block including systeminformation for intra-platform neighboring cells and a systeminformation block including system information for inter-platformneighboring cells.

Aspect 31: The method of any of aspects 24-30, wherein the systeminformation includes platform specific information for a neighboringplatform, the neighboring platform being associated with one or moreneighboring cells in the set of neighboring cells.

Aspect 32: The method of aspect 31, wherein the platform specificinformation includes orientation information associated with theneighboring platform.

Aspect 33: The method of any of aspects 31-32, wherein the platformspecific information includes positioning information associated withthe neighboring platform.

Aspect 34: The method of any of aspects 24-33, wherein the systeminformation includes cell specific information for each neighboring cellin the set of neighboring cells.

Aspect 35: The method of aspect 34, wherein the cell specificinformation for a given neighboring cell of the set of neighboring cellsincludes beam footprint information associated with a beam of the givenneighboring cell.

Aspect 36: The method of any of aspects 34-35, wherein the cell specificinformation for a given neighboring cell of the set of neighboring cellsincludes information that identifies a transmit power associated withthe given neighboring cell.

Aspect 37: The method of any of aspects 34-36, wherein the cell specificinformation for a given neighboring cell of the set of neighboring cellsincludes a cell identifier associated with the given neighboring cell.

Aspect 38: The method of any of aspects 24-37, wherein the systeminformation includes a platform identifier in an information element fora given neighboring cell in the set of neighboring cells.

Aspect 39: The method of aspect 38, wherein, when the given neighboringcell is associated with a neighboring platform, the information elementincludes an indication of whether platform specific information,associated with the neighboring platform, is included in the informationelement associated with the given neighboring cell.

Aspect 40: The method of aspect 39, wherein the information elementincludes the platform specific information, associated with the givenneighboring cell, when the indication indicates that the platformspecific information is included in the information element.

Aspect 41: The method of any of aspects 39-40, wherein the platformspecific information associated with the neighboring platform isincluded in only one information element of the system information for asingle neighboring cell.

Aspect 42: The method of any of aspects 24-41, wherein the systeminformation does not include platform specific information associatedwith the current platform.

Aspect 43: The method of any of aspects 24-42, wherein the systeminformation includes differential information for one or moreneighboring platforms associated with one or more neighboring cells ofthe set of neighboring cells, wherein full information, associated witha reference platform, is a reference for the differential information.

Aspect 44: The method of aspect 43, wherein the full informationassociated with the reference platform includes platform specificinformation associated with the current platform.

Aspect 45: The method of any of aspects 24-44, wherein the systeminformation includes differential information for one or moreneighboring cells of the set of neighboring cells, wherein fullinformation, associated with a reference cell, is a reference for thedifferential information.

Aspect 46: The method of aspect 45, wherein the full informationassociated with the reference cell includes cell specific informationassociated with the reference cell, the reference cell being: thecurrent cell of the current platform, a first cell of a particularplatform, or a center cell of the particular platform.

Aspect 47: An apparatus for wireless communication at a device,comprising a processor; memory coupled with the processor; andinstructions stored in the memory and executable by the processor tocause the apparatus to perform the method of one or more aspects ofaspects 1-23.

Aspect 48: A device for wireless communication, comprising a memory andone or more processors coupled to the memory, the memory and the one ormore processors configured to perform the method of one or more aspectsof aspects 1-23.

Aspect 49: An apparatus for wireless communication, comprising at leastone means for performing the method of one or more aspects of aspects1-23.

Aspect 50: A non-transitory computer-readable medium storing code forwireless communication, the code comprising instructions executable by aprocessor to perform the method of one or more aspects of aspects 1-23.

Aspect 51: A non-transitory computer-readable medium storing a set ofinstructions for wireless communication, the set of instructionscomprising one or more instructions that, when executed by one or moreprocessors of a device, cause the device to perform the method of one ormore aspects of aspects 1-23.

Aspect 52: An apparatus for wireless communication at a device,comprising a processor; memory coupled with the processor; andinstructions stored in the memory and executable by the processor tocause the apparatus to perform the method of one or more aspects ofaspects 23-46.

Aspect 53: A device for wireless communication, comprising a memory andone or more processors coupled to the memory, the memory and the one ormore processors configured to perform the method of one or more aspectsof aspects 23-46.

Aspect 54: An apparatus for wireless communication, comprising at leastone means for performing the method of one or more aspects of aspects23-46.

Aspect 55: A non-transitory computer-readable medium storing code forwireless communication, the code comprising instructions executable by aprocessor to perform the method of one or more aspects of aspects 23-46.

Aspect 56: A non-transitory computer-readable medium storing a set ofinstructions for wireless communication, the set of instructionscomprising one or more instructions that, when executed by one or moreprocessors of a device, cause the device to perform the method of one ormore aspects of aspects 23-46.

The foregoing disclosure provides illustration and description, but isnot intended to be exhaustive or to limit the aspects to the preciseform disclosed. Modifications and variations may be made in light of theabove disclosure or may be acquired from practice of the aspects.

As used herein, the term “component” is intended to be broadly construedas hardware, firmware, and/or a combination of hardware and software. Asused herein, a processor is implemented in hardware, firmware, and/or acombination of hardware and software.

As used herein, satisfying a threshold may, depending on the context,refer to a value being greater than the threshold, greater than or equalto the threshold, less than the threshold, less than or equal to thethreshold, equal to the threshold, not equal to the threshold, and/orthe like.

It will be apparent that systems and/or methods described herein may beimplemented in different forms of hardware, firmware, and/or acombination of hardware and software. The actual specialized controlhardware or software code used to implement these systems and/or methodsis not limiting of the aspects. Thus, the operation and behavior of thesystems and/or methods were described herein without reference tospecific software code—it being understood that software and hardwarecan be designed to implement the systems and/or methods based, at leastin part, on the description herein.

Even though particular combinations of features are recited in theclaims and/or disclosed in the specification, these combinations are notintended to limit the disclosure of various aspects. In fact, many ofthese features may be combined in ways not specifically recited in theclaims and/or disclosed in the specification. Although each dependentclaim listed below may directly depend on only one claim, the disclosureof various aspects includes each dependent claim in combination withevery other claim in the claim set. A phrase referring to “at least oneof” a list of items refers to any combination of those items, includingsingle members. As an example, “at least one of: a, b, or c” is intendedto cover a, b, c, a-b, a-c, b-c, and a-b-c, as well as any combinationwith multiples of the same element (e.g., a-a, a-a-a, a-a-b, a-a-c,a-b-b, a-c-c, b-b, b-b-b, b-b-c, c-c, and c-c-c or any other ordering ofa, b, and c).

No element, act, or instruction used herein should be construed ascritical or essential unless explicitly described as such. Also, as usedherein, the articles “a” and “an” are intended to include one or moreitems, and may be used interchangeably with “one or more.” Furthermore,as used herein, the terms “set” and “group” are intended to include oneor more items (e.g., related items, unrelated items, a combination ofrelated and unrelated items, and/or the like), and may be usedinterchangeably with “one or more.” Where only one item is intended, thephrase “only one” or similar language is used. Also, as used herein, theterms “has,” “have,” “having,” and/or the like are intended to beopen-ended terms. Further, the phrase “based on” is intended to mean“based, at least in part, on” unless explicitly stated otherwise.

What is claimed is:
 1. A method of wireless communication performed by auser equipment (UE), comprising: receiving system information associatedwith a set of neighboring cells included in a non-terrestrial network(NTN), wherein the UE is connected to or camped in a current cellincluded in the NTN, the current cell being associated with a currentplatform; and monitoring a neighboring cell, of the set of neighboringcells, based at least in part on the system information.
 2. The methodof claim 1, wherein the system information includes a list ofintra-platform neighboring cells associated with the current platform.3. The method of claim 1, wherein the system information includes ablacklist of intra-platform neighboring cells associated with thecurrent platform.
 4. The method of claim 1, wherein the systeminformation includes a list of neighboring platforms.
 5. The method ofclaim 4, wherein the system information includes at least one of a listof neighboring cells associated with a given neighboring platform on thelist of neighboring platforms or a blacklist of neighboring cellsassociated with the given neighboring platform on the list ofneighboring platforms.
 6. (canceled)
 7. The method of claim 1, whereinthe system information includes a system information block includingsystem information for intra-platform neighboring cells and a systeminformation block including system information for inter-platformneighboring cells.
 8. The method of claim 1, wherein the systeminformation includes platform specific information for a neighboringplatform, the neighboring platform being associated with one or moreneighboring cells in the set of neighboring cells.
 9. The method ofclaim 8, wherein the platform specific information includes at least oneof orientation information associated with the neighboring platform orpositioning information associated with the neighboring platform. 10.(canceled)
 11. The method of claim 1, wherein the system informationincludes cell specific information for each neighboring cell in the setof neighboring cells.
 12. The method of claim 11, wherein the cellspecific information for a given neighboring cell of the set ofneighboring cells includes at least of: beam footprint informationassociated with a beam of the given neighboring cell, information thatidentifies a transmit power associated with the given neighboring cell,or a cell identifier associated with the given neighboring cell. 13-14.(canceled)
 15. The method of claim 1, wherein the system informationincludes a platform identifier in an information element for a givenneighboring cell in the set of neighboring cells.
 16. The method ofclaim 15, wherein, when the given neighboring cell is associated with aneighboring platform, the information element includes an indication ofwhether platform specific information, associated with the neighboringplatform, is included in the information element associated with thegiven neighboring cell.
 17. The method of claim 16, wherein theinformation element includes the platform specific information,associated with the given neighboring cell, when the indicationindicates that the platform specific information is included in theinformation element.
 18. The method of claim 16, wherein the platformspecific information associated with the neighboring platform isincluded in only one information element of the system information for asingle neighboring cell.
 19. The method of claim 1, wherein the systeminformation does not include platform specific information associatedwith the current platform.
 20. The method of claim 1, wherein the systeminformation includes differential information for one or moreneighboring platforms associated with one or more neighboring cells ofthe set of neighboring cells, wherein full information, associated witha reference platform, is a reference for the differential information.21. The method of claim 20, wherein the full information associated withthe reference platform includes platform specific information associatedwith the current platform.
 22. The method of claim 1, wherein the systeminformation includes differential information for one or moreneighboring cells of the set of neighboring cells, wherein fullinformation, associated with a reference cell, is a reference for thedifferential information.
 23. The method of claim 22, wherein the fullinformation associated with the reference cell includes cell specificinformation associated with the reference cell, the reference cellbeing: the current cell of the current platform, a first cell of aparticular platform, or a center cell of the particular platform.
 24. Amethod of wireless communication performed by a base station,comprising: determining system information associated with a set ofneighboring cells included in a non-terrestrial network (NTN), wherein auser equipment (UE) is connected to or camped in a current cell includedin the NTN, the current cell being associated with a current platform;and transmitting the system information associated with the set ofneighboring cells.
 25. The method of claim 24, wherein the systeminformation includes at least one of: a list of intra-platformneighboring cells associated with the current platform, a blacklist ofintra-platform neighboring cells associated with the current platform,or a list of neighboring platforms. 26-29. (canceled)
 30. The method ofclaim 24, wherein the system information includes a system informationblock including system information for intra-platform neighboring cellsand a system information block including system information forinter-platform neighboring cells.
 31. The method of claim 24, whereinthe system information includes platform specific information for aneighboring platform, the neighboring platform being associated with oneor more neighboring cells in the set of neighboring cells. 32-33.(canceled)
 34. The method of claim 24, wherein the system informationincludes cell specific information for each neighboring cell in the setof neighboring cells. 35-37. (canceled)
 38. The method of claim 24,wherein the system information includes a platform identifier in aninformation element for a given neighboring cell in the set ofneighboring cells. 39-41. (canceled)
 42. The method of claim 24, whereinthe system information does not include platform specific informationassociated with the current platform.
 43. The method of claim 24,wherein the system information includes differential information for oneor more neighboring platforms associated with one or more neighboringcells of the set of neighboring cells, wherein full information,associated with a reference platform, is a reference for thedifferential information.
 44. (canceled)
 45. The method of claim 24,wherein the system information includes differential information for oneor more neighboring cells of the set of neighboring cells, wherein fullinformation, associated with a reference cell, is a reference for thedifferential information.
 46. (canceled)
 47. A user equipment (UE) forwireless communication, comprising: a memory; and one or more processorsoperatively coupled to the memory, the memory and the one or moreprocessors configured to: receive system information associated with aset of neighboring cells included in a non-terrestrial network (NTN),wherein the UE is connected to or camped in a current cell included inthe NTN, the current cell being associated with a current platform; andmonitor a neighboring cell, of the set of neighboring cells, based atleast in part on the system information. 48-69. (canceled)
 70. A basestation for wireless communication, comprising: a memory; and one ormore processors operatively coupled to the memory, the memory and theone or more processors configured to: determine system informationassociated with a set of neighboring cells included in a non-terrestrialnetwork (NTN), wherein a user equipment (UE) is connected to or campedin a current cell included in the NTN, the current cell being associatedwith a current platform; and transmit the system information associatedwith the set of neighboring cells. 71-184. (canceled)